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Volume 44 Issue S2
Dec.  2023
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Xiao Peng, Luo Qi, Xia Bangyang, Zhang Guangchun, Yao Dong, Zhou Yajing, Fang Chao, Li Tianya. Research on Few Group Cross-Section Generation Method For Fast Reactor Based on Monte Carlo Code[J]. Nuclear Power Engineering, 2023, 44(S2): 17-22. doi: 10.13832/j.jnpe.2023.S2.0017
Citation: Xiao Peng, Luo Qi, Xia Bangyang, Zhang Guangchun, Yao Dong, Zhou Yajing, Fang Chao, Li Tianya. Research on Few Group Cross-Section Generation Method For Fast Reactor Based on Monte Carlo Code[J]. Nuclear Power Engineering, 2023, 44(S2): 17-22. doi: 10.13832/j.jnpe.2023.S2.0017

Research on Few Group Cross-Section Generation Method For Fast Reactor Based on Monte Carlo Code

doi: 10.13832/j.jnpe.2023.S2.0017
  • Received Date: 2023-07-11
  • Rev Recd Date: 2023-08-03
  • Publish Date: 2023-12-30
  • In order to improve the accuracy of neutronics analysis for fast reactors and solve the complex resonance problem faced by traditional deterministic method in making few group cross-sections of fast reactors, this paper, based on the two-step method of assembly homogenization-core transport calculation, studies the method of assembly homogenized few group cross-section by using the Monte Carlo code from the aspects of anisotropic scattering, energy group structure and leakage correction. The numerical results show that the resonance effect of medium-mass nuclides can be well treated in the fast reactor few group cross-section generation based on the Monte Carlo code; the effects of anisotropic scattering can be effectively considered with 1-order scattering cross-section or transport modified few group section. Core effective multiplication factor ( keff ) may decrease due to the decrease in the number of energy groups of few group cross-section; core keff may increase due to the leakage correction. When Monte Carlo code is used in few group cross-sections generation of fast reactor, the keff deviation of core transport is less than 100 pcm (1pcm=10−5), and the power distribution deviation is less than 2%.

     

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